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Clayton <br /> ENVIRONMENTAL <br /> CONSULTANTS <br /> FIVED <br /> NOV 0 61997 <br /> Page 2 of 4 <br /> Analytical Results �?US. ADh/IN UNIT <br /> for <br /> Pacific Gas & Electric Company <br /> Client Reference: MCDONALD ISLAND <br /> Clayton Project No. 97103 . 18 <br /> Sample Identification: GAS WELL 18W-ID-A Date Sampled: 10/30/97 <br /> Lab Number: 9710318-OIA Date Received: 10/30/97 <br /> Sample Matrix/Media: SOIL Date Extracted: 10/30/97 <br /> Extraction Method: EPA 3550 Date Analyzed: 11/02/97 <br /> Method Reference: EPA 8015 (Modified) Analyst: FAK <br /> Limit <br /> of <br /> Concentration Detection <br /> Analyte CAS # (mg/kg) (mg/kg) <br /> Total Extractables <br /> Total-Extractables -- 100 5 <br /> PTPH-Oil -- 100 20 <br /> Surrociates Recovery OC Limits (�) <br /> p-Terphenyl 92-94-4 107 50 - 150 <br /> ND: Not detected at or above limit of detection <br /> --. Information not available or not applicable <br /> Results are reported on a wet weight basis, as received. <br /> Total Extractables = Extractable hydrocarbons from C10 to C42 quantitated as diesel. <br /> TPH-0 = Extractable hydrocarbons, that appear to match the typical oil pattern from C20 to C42 <br /> quantitated as oil. <br /> Note: Detection limits increased due to dilution necessary for quantitation. <br />